JPS625620Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a load cell scale used in checkout operations.

As shown in FIG. 1, a recess 2 is formed in a table 1 for handling products, etc., and a base 3 is provided at the bottom of the recess 2. A load cell 4 is fixed to this base 3, and a calculation unit is installed. A printed wiring board 5 that holds electronic components such as an analog-to-digital converter and the like is attached via a mounting plate 6, and a supporting column 9 of a saucer frame 8 that holds a receiving tray 7 is connected to the low cell 4, and an opening for allowing the supporting column 9 to escape. 10 is formed, and the load cell 4 and the printed wiring board 5
A box-shaped cover 11 with enough space to store
There is one in which the screw is screwed to a boss 12 which is set upright on the base 3.

However, in this type of model, the cover 11
Since the cover 11 has to be deep-drawn, the number of pressing steps increases, and in particular, since the printed circuit board is held in a vertical plane, the depth of the cover 11 increases, making it even more difficult to form and requiring more space in the vertical direction. increase Also, the levelness of the base 3 is adjusted by turning the adjusting leg 13, but in this case, the recess 2
Since the adjusting leg 13 and lock nut 14 cannot be turned inside, the operation of taking the base 3 out of the recess 2, adjusting it, and then putting it back into the recess 2 and checking must be repeated many times. For this reason, it is conceivable to remove the saucer 7 and cover 11 and turn the adjusting legs 13 from above, but it is extremely troublesome to remove the cover 11 every time, and from the point of view of protecting the internal electronic components. I don't like it.

Further, water droplets easily enter from the attachment portion of the adjustment leg screwed into the base, and protection of electronic components from water droplets is insufficient.

This idea was devised in view of the above points.The cover attached to the base can be a flat plate, and the horizontality of the base can be adjusted without removing the cover, and load cells etc. can be adjusted when adjusting. There is no risk of water droplets entering the central space, effectively protecting the load cell, etc.
It is an object of the present invention to provide a load cell weigher that can prevent water droplets from entering a central space even during use.

This idea consists of a deep central space with an upper opening in which load cells, printed wiring boards, etc. are housed while being isolated from the outside by a partition wall, and adjustable legs located outside this central space that have a rotary operation section at the upper end in a vertical position. A base integrally formed with a holding screw seat by casting, a flat cover attached to the upper opening of the central space to close the central space, and a cover located on the upper part of the base to rotate the adjustment leg. It is characterized by a saucer that is detachably provided so as to cover the entire upper part of the base including the base. Therefore, since the base is formed by casting, it can be easily manufactured even if the depth of the central space is deep, and as a result, the cover that closes the central space that houses the load cell, printed wiring board, etc. can be made from a flat plate. In addition, since the screw seat into which the adjustable leg is screwed is not covered with a cover, the rotating operation part of the adjustable leg can be exposed by simply removing the saucer without removing the cover. This makes it possible to adjust the levelness of the base, and there is no risk of water droplets entering the center space of the base during adjustment.In addition, when in use, the saucer, including the part where the adjustment legs are installed, Since the upper part is covered, there is no risk of water droplets entering.
The structure is such that the appearance can also be improved.

An embodiment of this invention will be explained based on FIGS. 2 and 3. Components that are the same as those described in FIG. 1 are designated by the same reference numerals, and description thereof will be omitted. A box-shaped base 15 with an open top is cast from an aluminum alloy. Most of the middle part of this base 15 is a central space 18 that accommodates the load cell 4, transformer 16, and printed wiring board 17.
Furthermore, screw seats 20 are formed at the four corners, and are separated from the central space 18 by partition walls 19. These screw seats 20 have a locking screw 21 formed by a wing nut screwed into the upper part thereof, and an adjusting leg 22 which abuts against the recess 2 at the lower part thereof. A groove 23 is formed in the upper part of these adjustment legs 22 as a rotary operation part that engages with a screwdriver or the like. A level 24 is provided on the upper surface of the saucer frame 8. The printed wiring board 17 includes a connector 25 as a power input section connected to the transformer 16, a connector 26 connected to the load cell 4, and an ADC.
The volume 27, the zero adjustment key 28, and the connector 29 for connecting an external circuit are electrically connected and held. This connector 29 faces an opening 30 formed in the base 15 and is connected to an external connector 31 connected to an external circuit.

Next, a plurality of bosses 32 are erected at the bottom of the base 15. Then, the bushings 33 penetrating the printed wiring board 17 are fitted onto each boss 32, and the printed wiring board 17 is fitted onto each bushing 33.
The printed wiring board and the cover 35 are fitted by fitting the sleeves 34 that hold them down, placing the cover 35 on these sleeves 34, and screwing the screws 36 passed through the cover 35, the sleeve 34, and the bush 33 into the boss 32. is held horizontally. This cover 35 partially has a bent piece 37 that fits into the outer wall of the base 15, but it is very shallow and is pressed into an almost flat plate shape.

In such a configuration, when an item sent on the platform 1 is placed on the tray 7, the load is converted into an electric signal and measured. The measurement results are displayed on a display (not shown), which is connected as an external circuit by connectors 29 and 31.
In addition, the cover 35 is flat and has a bent piece 37, but is shallow, so it can be easily processed with fewer pressing steps. Although the base 15 is deep and has a complicated shape, it can be easily manufactured by casting.

Since the saucer 7 is located at the top level, it can be easily removed. This exposes the adjusting leg 22, and by engaging a screwdriver or a coin in the groove 23 and rotating the adjusting leg 22 while watching the level 24, the levelness of the base 15 is adjusted. Then, when the levelness is adjusted, the lock nut 21 is tightened. This work can be done very easily without removing the cover 35, and it is very convenient to protect the electronic parts since it is done with the internal electronic parts shielded from the outside air.

In this invention, as mentioned above, the base with the central space for storing the load cell, printed wiring board, etc. is formed by casting, so the central space can be easily formed deep, and this allows the central space to be closed off. The cover can be formed into a flat plate shape, making it easy to manufacture.Moreover, since the screw seat into which the adjustment leg having the rotation operation part on the upper part is screwed is formed outside the central space, the cover can be easily manufactured. The levelness of the base can be adjusted without removing it, which effectively protects the load cell etc. from water droplets.Also, since the saucer covers the rotating operation part of the adjustment leg during use, There is no risk of touching the adjustment legs, and therefore there is no risk of measurement errors caused by uneven horizontality.
This has the effect of increasing reliability, preventing water droplets from entering the central space, and improving the appearance since the saucer covers the entire upper part of the base.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing the conventional overall structure, Fig. 2 is a plan view of a base showing an embodiment of this invention, and Fig. 3 is a cross section taken along the line A-A in Fig. 2. FIG. 3 is a vertical side view showing the structure. 4...Load cell, 7...Saucer, 15...Base, 17...Printed wiring board, 18...Central space, 19...Partition wall, 20...Screw seat, 22...
Adjustable leg, 23...groove (rotation locking part), 35...cover.

Claims (1)

[Scope of utility model registration request] A deep central space with an upper opening that stores load cells, printed wiring boards, etc., separated from the outside by a partition wall, and a screw seat that is located outside this central space and holds the adjustable leg, which has a rotation operation part at the upper end, in a vertical position. A base integrally formed by casting, a flat cover attached to the upper opening of the central space to close the central space, and a rotation operation part of the adjustment leg located at the upper part of the base 1. A load cell weigher comprising a removably mounted saucer so as to cover the entire upper part of its base.